developers:fixapi:standardtrailer [Documentation]

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.

====== STANDARD TRAILER ======

The Standard Trailer terminates all FIX messages with a checksum for message integrity.

===== Message Specification =====

**Required in all messages**

^ Tag ^ Field Name ^ Type ^ Req'd ^ Description ^
| 10 | CheckSum | String | Y | Three-digit checksum (always last field) |

===== Checksum Calculation =====
  * Sum all bytes in message (excluding checksum field)
  * Modulo 256 of sum
  * Format as three-digit string with leading zeros

===== Example =====
<code>
8=FIX.4.2|9=73|35=0|49=SENDER|56=TARGET|34=1|52=20120101-12:00:00.000|10=215|
                                                                      ^^^^^^
                                                                     Checksum
</code>

===== Notes =====
  * Always unencrypted
  * Must be the last field
  * Exactly 3 characters (pad with zeros)
  * Delimiter (SOH) follows checksum